134 A Monograph of the Myxogastres. 



(Type in Herk. Berk., Kew, n. 10852.) 

 On bark. Ceylon. 



Resembling in many respects Ophiotlieca vcrmicularis, but 

 distinguished by the very minute, scattered warts on the spores. 



Ophiotlieca cano-flavesceus, Mass. 



Sporangia gregarious, standing on a thin, yellow-grey hypo- 

 thallus, globose to hemispherical, or lengthened to reniform, 

 sessile, *5 mm. broad, bright yellow-grey, splitting more or less 

 regularly with a lid. The wall contains numerous round or 

 angular particles. The upper part of the wall, on its inner 

 side, provided with delicate thickenings combined into a regular 

 network ; meshes of the network 5 6-gonal and 1 2 jx diameter. 

 Capillitium scarcely evident, only consisting of a few, slightly- 

 branched or quite unbranched threads of variable width, un- 

 equally warted, colourless, yellowish ; without regard to the 

 thickenings the tubes are 1'5 2 jx broad. 



Spores golden-yellow, delicately warted, 12*5 14 /x diameter. 



Perichaena cano-flavcscens, Raunkier, Myx. Dan., p. 107, t. 2, 

 fig. 10. 



On bark of beech. Denmark (Lolland). 



Ophiotheca vennicularis, Mass. (figs. 198, 198 a}. 



Sporangia circular, irregularly lobed, or venulose and anasto- 

 mosing to form an irregular network ; when the sporangia are 

 circular or simply lobed there is usually a well-defined, up- 

 raised marginal portion, wall smooth with masses of lime inside, 

 varying from flesh-colour, through brown to umber; mass of 

 capillitium and spores flesh-colour or bright-yellow ; capillitium 

 well-developed, attached at numerous points to wall of spor- 

 angium, combined to form a loose, irregular net, threads 3 4 /x 

 diameter, equally covered vjith mimerous short, straight or curved, 

 sometimes branched, raised bands ; sometimes a few rounded warts 

 are intermixed, these latter now and again run out with 

 prominent spines ; spores globose, densely and thickly covered 

 with small, depressed warts, 10 13 /x diameter. 



